Reduction-crusher



4T. L. SMITH AND E. L. sANBoRN.

' REDUCTION CRUSHER.

'Patented Oct. 19, 1920.

W/r/vfmmr. i -i 'd UNITED STATES PATENT OFFICE.

THOMAS L. SMITH AND EUGENE L. SANBORN; OF MILWAUKEE. WISCONSIN, ASSIGNORS TO SMITH ENGINEERING WORKS, OF MILWAUKEE, WISCONSIN,

A CORPORATION 0F WISCONSIN.

REDUCTION-CRUSHER.

To all whom t may concern Be it known that we, THOMAS L. SMITH and EUGENE L. SANBORN, citizens of -the ings, which are a part of this specification.

This invention relates to reduction crushers of the type in which the crusher head is revolubly mounted upon a fixed stationary upright shaft and coperates with a concave surrounding it, and has for its object to vary A the size of the product by an adjustment of the concave supporting portion of the frame on the upright shaft and on the base portion of the frame to move the concave nearer to or farther from the crusher head.

Another object of the invention is to fix the concave rigidly in place in the various adjustments thereof by providing means for preventing play or lateral motion between the upright shaft and the concave supporting portion of the Vframe and between the latter and the base portion of the frame. A further object o'f the invention is to provide such a crusher adapted to supply lubricant to the various working parts and maintaining tight connections for confining the lubricant to the working parts and for excluding grit therefrom in all positions of adjustment for varying the Size of the product. I

With the above and other objects in view the invention consists in the reduction crusher as herein claimed and all equivalents. Referring to the accompanying drawing the figure represents a central vertical sectional view of a reduction crusher constructed in accordance with this invention.

In this drawing 10 indicates the base portion of the frame which, instead of continu ing upwardly as an integral casting to include the support for the crushing concave as usual, terminates on a horizontal plane about the elevation of the widest portion of the crusher head. The upper portion of. the

frame is made in a separate frame section` 11 which is adjustably fitted with and s e- Specication of Letters Patent.

Patented Oct. 19, 1920.

Application led November 6, 1916. Serial No. 129,665.

cured tothe 'I lower frame section 10 so as to be capable of being raised and lowered thereon.

The upper frame sectionl l11 is provided with the crushing concave 12, of the type which flares downwardly. Across the hopperlike mouth of the upper frame section is the usual arched spider 13 integrally formed with the upper frame section and constituting a support for the stationary lverticalcrusherhead shaft 14, which, at its4 lower end, is supported by the spider 15 integral with the lower frame section 10. A broad conical crusher head 16 rests on a fiat bearing ring 17 mounted on the edge ofthe gear housing of the lower spider and an eccentric Sleeve 18 surroundlng thevertical shaft 14 and fitting within the bore of the crusher head 16 has a beveled gear wheel 19 fixed on its lower end and meshing with a `beveled/pinion 20 on a suitably driven coun vtershaft 21 by which a'turning movement is given thereto to cause the crusher head to slide on the flat bearing ring 17 and cause thef'part of nearest approach to the concave 12-vv to travel around said concave and `thus enlarge and then reduce the size of the openinvr between thecrusher head and the concafe at each part thereof to effect the crushing operation on the rock or other material within the hopper.

The upper frame section 11 has a downwardly extending annular skirt portion 22 fitting within a horizontal flange 23 of the lower frame section and having a tapering outer face corresponding in its inclination 4with the inclined inner surface of a wedge ring 24 which is confined within the space between said skirt portion 22 and the lower frame section. The wedge ring 24 is provided with a number of screws 25, one of which is shown in the drawing, 'said' screws bein threaded in the wedge ring and passing lrough openings in the outwardly extending horizontal flange 26 of the upper frame section and having lock nuts 27 threaded thereon and bearing on said fiange. These screws 25 may be made. to draw the wedge ring 24 upwardlyby turning the nuts 27 thereon, thusfirmly wedging the ring 'between the lower frame section and the upper frame section to prevent lateral or sidewise movements of the latter in an adjusted position thereof. rlhe vertica ad@ justments of the upper frame are accomplished by means of jack screws 28 threaded in the horizontal flange 29 of the lower frame section and bearing on the flange 26. i

When the clamping ring is loose said jack screws 28 may be turned to either raise or lower the upper frame section. Distance plates 30 may be placed between the flanges 26 and 29 to fill the space between them when the proper adjustment has been obtained and then the two'frames are clamped together by clamping bolts 31 assing through said flanges. A steel ban 32 is placed around the flanges 26 and `29 where it is removably clamped to protect/the space between the two frames against the entry of dirt which might interfere with adjustments.

In order that this vertical adjustment of the upper frame section with relation .to the lower frame section may not be inter'- ferred with by its connection with the vertical shaft 14, the latter is given a sliding fit in the hub of the spider 13 andits conical upper end issurrounded by a tapering bushing 33 which is slotted vertically from the top and bottom to make it expansible. A cup washer 34 bears on the tapering bushing and is forced thereagainst by set nuts 35 threaded onl a stud 36 projecting from the end of the shaft. With the nuts 35 .loose so that the bushing 33 contracts away from the walls of the bore through the hub of the spider 13, the vertical adjustments of the upper frame section 11 may be accomplished without hindrance by the shaft 142 the upper end ofv said shaft and its clamping parts freely moving within the bore of the spider. When the desired adjustment is accomi plishedj the tightening of the nuts 35 forces the washer 34 against the bushing 33 and causes the latter to expand along the conical surface of the shaft until it becomes tightly wedged between the shaft and the bore of the spider'where it firmly holds the shaft against play by rigidly connecting it with the spider of the upper frame section.

For convenience the lower end of the shaft may be similarly connected to the spider 15 of the lower frame section, though here it is preferred to taper the bushing 33 ,externally to fit within the bore ofthe spider which is correspondingly flaring. The upper shaft connection is preferably covered by a cap 37 as usual and the -lower shaft connectionV is inclosed by a cap 38.

Besides the ,flat bearin ring 17 for supporting the Crusher hea theren are other renewable friction wearing parts such as lthe flanged Babbitt sleeve 39 which is removably fitted within thel bore of the crusher head and consists of a die casting so as toy bey renewable in the field without requiring the melting or ouring vof Babbitt metal. Also there' is the abbitt sleeve '40 surroundingthe shaft 14 and the. antifriction'rings 41 between the lower end of theeccentric sleeve 18 and the hub of the lower spider 15.

`The fact that the upper frame section is vertically adjustable on the lower frame section in order to vary the size of the opening between the crusher head and the concave makes it impracticable to conduct lubv which leads to the bore thereof. This opening communicates through the slots of the ta er bushing 33 with radial openings 46 dr1lled in the shaft 14 so that the oil is thus pumped to the central boreof the shaft from which it passes out through other radial openings 46 at different elevations to lubricate the bearing between the shaft and the eccentric sleeve. Continuations of these radial openings passing through the walls of the eccentr1c sleeve serve to conduct the f lubricant to the bearing between the eccentric sleeve and the Crusher head, while inclined passageways 47 through the crusher head conduct a part of the lubricant to the flat bearing surface between the Crusher head and the bearing ring. Lubricant is thus conducted to all wearing parts and eventually finds its way to the gear casing in the lower spider 15 where it serves to lubricate the driving gears and the countershaft bearings. From the gear housing the oil is conducted by a returnpipel 48 to the reservoir 44.

The vertical adjustment of the upper frame section makes it necessary to provide an 'expansible shield 'around the upper portion of the shaft to prevent grit from entering between the upper spider 13 and the crusher head and to prevent oil 'from being forced out above the Crusher head. A cir-v cular plate 49 surrounds the shaft and rests on the upper end of the crusher head while an annula'r gropve in its upper face receives Ian oil ring 50 which also lits within an antion.

plished by means of the jack screws 28 and from their adjustments-they are provided with square heads at their upper ends on which square collars 53 are fitted, said collars being let into recesses in the upper part of the spider hub, and the engagement of the collars with one or more of the flat sides of the recesses serving to prevent their rotation.

In operation the crusher head is revolved about the shaft by means. of the turning 'of the eccentric sleeve 18 therebetween. This movement is without positive rotation, though the head is free to turn. Its weight and downward stress are taken by the at bearing ring 17 with which the edge -of the crusher` head maintains a tight fit preventing the loss of lubricant andy avoiding the introduction of dust or grit. This seat for the crusher head is fixed and adjustment to change the size of the product is effected by the raising or lowering of the upper frame section with respect to the lower frame sec- This adjustment is readily accomis maintained by the distance plates 30 and the clamping bolts 31, while all lateral play of the upper frame section within the lower frame section is taken up by the wedge ring 24 lifted into its crowding fit between the vertical and inclined walls of the frame sections by turning the nuts on screws 25. This adjustment of the upper frame section to move the crushing concave nearer to or farther from the crusher head is made possible, notwithstanding the fact that the vertical shaft is engaged at its upper end by the spider of the upper frame section, because of the adjustable clamping connection for the upper end of the vertical shaft in said spider. Furthermore, this vertical adjustment of the upper frame section to vary the v size of the product is accomplished without a waste of lubricant through the varying gap between the upper end of the crusher head and the hub ofthe upper spider, for the oil ring 50 serves with the plate 49 to complete the inclosure' to confine the oil and exclude dust and gpit in all positions of adjustment.l j V The diliculty of providing a proper flow of lubricant to the wearing parts in a reduc'- tion crusher of this type'because of the adjustability of the upper portion of the frame is overcome by the -present method of utilizing the stationary vertical shaft as a lubricant conductor with outlet ducts leading therefrom to the various wearing surfaces.

The lubricated interior working parts are entirely inclosed, preventing the introduction of dust and grit so that lubrication is effective without undue cutting 0r abrasion of bearings.

f By supporting the concave on an adjustable portion of the frame having clamping engagement with the stationary vertical shaft as well as with the stationary base` tightly clamped to the vertical shaft above j the level of the concave and being tightly clamped to the base portion of the frame below the level oftheconcave insures an unyielding relation betweenthe crusher head and the concave notwithstanding the adjustment ofthe latter.- T'he efficiency and the durability of the crusher are thus increased by reason of the structure constituting this invention.

Another advantage for dividing the frame into an upper and lower frame section'along a line between the concave and the crusher head support is that it permits of the removal of the crusher head Without the necessity for removing the concave from the shell or frame even though the concave is of the downwardly flaring type to produce with the bell-shaped crushing head a mean discharge of greater diameter than the mean feed diameter. In order to make the crushing head, theshell and the concave liners all of an outwardly and downwardly flaring shape with the bottom diameter of j the crushing head -greater than the top crushing diameter of the concave liners and .the .shell such division of the frame into "head on the stationary shaft, a downwardly flaring crushing concave surrounding the crusher head -and coperating therewith, and an upper frame section supporting the crushing concave and having adjustable supporting connection with the upper end of the shaft and with the lower frame section respectively and removable to permit of the removal of the crusher head.

2. A vreduction crusher, comprising a lower frame section, a vertical shaft thereon, a suitably operated crusher head surrounding the shaft, a downwardly flaring crushing concave surrounding the crusher head and coperating therewith, and an upper frame section carrying the crushing concave and having adjustable connection with the shaft above the concave and with the lower frame section below the concave.

3. A reduction crusher, comprising a lower frame section, an upstanding shaft rigidly mounted thereon, a crusher head mounted on the shaft, a downwardly flaring crushing concave, and an upper iframegdo the distance between the concave and the crusher head and provided with a spider having adjustable clamping connection with the shaft.

4. A reduction crusher, comprising a l `frame section, an upstanding shaft secured yjustable.

thereto, a crusher head mounted thereon, a downwardly flaring crushing concave, and an adjustable support for the crushing -con cave adjustably mounted on the upstanding shaft and having lateral engagement with the frame section.

5. A reduction crusher, comprising a frame, an rupstanding shaft secured at both ends to the frame, a crusher head mounted on the shaft, a downwardly flaring concave mounted on the frame coperating with the crusher head, said frame being split between the concave and the lower end of the shaft whereby the upper frame section with the concave maypbe adjusted toward and away from the lower frame section with the crusher head, the connection between the frame and one end of the shaft being adreduction crusher', comprising a frame having an upper spider and a lower spider, an upstanding shaft connecting the two spiders and having its connection with one spider adjustable, av crusher head su-rrounding the shaft, and a downwardly flaring concave mounted on the frame, saig frame being split between the lconcave an the lower spider to permit of adjustment` between the upper frame section andthe lower frame section to vary the distance between the concave and the crusher head.

7 A reduction crusher, comprising -a lower frame section,l an upstanding shaft mounted thereon, a crusher head, surrounding the shaft, lan upper frame section adjustably clamped on the shaft and adjustably fitting on the lower frame section, a crushing concave carried by the upper frame section, means: for yadjusting the upper frame section on the lower frame section, a wedge ring fitting between the frame sections to take up lateral play therebetween, and means for moving the wedge ring.

8. A reduction crusher, comprising a lower frame section, an upstanding shaft thereon, a crusher head mounted on the shaft, a concave, an upper frame section carrying the concave and adjustably connected with the shaft, said upper frame section having a telescoping fit with the lower frame section with an annular space between them, a wedge ring within the annular space, means for moving the ring and means for 'raising and lowering the upper frame section.A l

9. A reduction crusher, comprising a lower Aframe section, and an upper frame section having outwardly projecting flanges, i

. clamping bolts passing through the flanges,

jack screws threaded through one flange and engaging the other flange for adjusting the upper fiame section. on the lower frame section, distance lates between the flanges,

an inwardly projecting flange on the lowen frame section at a distance from the outwardly extending flange, a downwardly ex-4 tending'flange on the upper frame section having an inclined surface and a telescoping fit with the said inwardly projecting flange, a wedge ring fitting in the annular space between the lower frame section and the downwardlyV extending flange, screws for moving the ring into clamping engagement with the inclined surface of the downwardly `extending flange, a band surroundingthe joint between the upper and lower frame sections, a shaft mounted on the lower frame section, a crusher head thereon and a concave carried by the upper frame section.

10. A reduction crusher, comprising upper and lower frame sections adjustable with relation to each other, an upstanding shaft on the lower frame section, a crusher head mounted thereon, a downwardly flar. ing concave carried by the upper frame section, a spider on the up er frame section having an opening in its iiub in which the upper end of the shaft fits, said upper end of the shaft being conical-a split tapering bushing fitting between the conical end of the shaft and the wallof the opening, and

means for forcingsaid bushing to tightly clamp the end of the shaft in thespider .inf adjusted positions thereof, the upper frame section being detachable from the lower frame section to permit ofthe removal ofl the crusher head.

11. A reduction crusher, comprising an upper and lower frame section adjustable with relation to each other, a stationary upstanding hollow shaft mounted on the lower frame section and adjustably secured to the, spider of the upper frame section, a crusher head 4mounted on lthe shaft, a concave mounted on the upper frame section, an oil ring recessed within the hub of the spider of the upper frame section, a plate engaged thereby and bearing on the upper end of the crusher head, adjusting screws countersunk withinthe hub of the spider and bearing on the oil ring, and a means for supplying lubricant under pressure tothe interior of the shaft, there being openings through the shaft for conducting lubricant to the' wearing parts.

shaft, a bell-shaped crushinghead surrounding the shaft, an. outer shell supporting the crushing head and shaft above and below, concave liners for saidshell coperating with the crushing head and the said crushing head and shell and concave liners all being flared outwardly and downwardly In testimony whereof We afx our signe-l Wth the bottom crushing diameter of the tures, in presence of two Witnesses.

crushing head greater than the top crlsh` THOMAS L SMITH inv diameter of the concave liners an o s 5 th Shell, said shell being sectioned hori- L' SANBORN" zontally below the concave liners to per- Witnesses:

mit the removal of the crushing head With- A. VAN Kooy,

out removing the liners from the shell. FRANK A. WUssON. 

